| Detailed Description: |
COA
ITEM |
FAO specification |
RESULT |
Appearance |
An aqueous solution, free from visible extraneous matter, and must contain an effective emetic |
Bluish liquid |
Content of A.I., g/l |
≥500
Not differ from that declared by more than ± 25 g/l |
500 |
Impurity I, g/kg
Free 4,4'-bipyridyl |
≤1.0 |
1.0 |
Impurity II, mg/kg
Total terpyridines |
≤0.001 |
0.001 |
pH value |
2.0-6.0 |
4.0 |
Mode of action:
Paraquat inhibits photosynthesis. In light-exposed plants, it accepts electrons from photosystem I (more specifically Fd which is presented with electrons from PS I) and transfers them to molecular oxygen. In this manner, destructive reactive oxygen species are produced. In forming these reactive oxygen species, the oxidized form of paraquat is regenerated, and is again available to shunt electrons from photosystem I to start the cycle again.
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